Ecosystem should be correct sorry if I am wrong
        
                    
             
        
        
        
Alcohol
may positively affect the cardiovascular system of people over 50 years old by
reducing the risk of clot formation. 
 
<span>Just like with the other body systems, excessive alcohol can have lethal
effects on the cardiovascular system. Chronic alcohol use can upsurge the
workload of the heart which can then lead to arrhythmia's or what is called an irregular
heart beat, inflammation of the heart muscle or myocarditis, weakening of the
heart muscle or cardiomyopathy, increased cholesterol, and even hypertension.
Other problems are prominent with blood clotting and an increased workload of
the heart that is linked to cirrhosis of the liver.</span>
 
        
             
        
        
        
Answer: A. Extirpation
Explanation:
The term extirpation is also known as local extinction. It is situation whereby a particular species ceased to exist in an environment where it was once found, though it's existence is still observed elsewhere.
Extirpation maybe as a result of unfavorable environmental and human factors such as hunting, food scarcity and climate variation. 
 
        
             
        
        
        
E.coli because e coli is a bacteria. 
        
                    
             
        
        
        
Answer: The average speed of the zebra during time between 0s and 40s is 34 seconds.